// Copyright (C) Kumo inc. and its affiliates.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//


#pragma once

#include <pollux/buffer/buffer.h>
#include <pollux/common/base/exceptions.h>
#include <pollux/type/type.h>

namespace kumo::pollux {
    template<typename T>
    static inline BufferPtr copyToBuffer(
        const T &values,
        pollux::memory::MemoryPool *pool,
        melon::Optional<int32_t> size = melon::none,
        bool returnsNullptr = false) {
        using Value = typename T::value_type;
        POLLUX_CHECK(pool, "pool must be non-null");
        POLLUX_CHECK(
            !size.has_value() || size.value() <= values.size(),
            "size out of bound: {}",
            size.value());
        int32_t numValues = size.has_value() ? size.value() : values.size();
        if (numValues != 0) {
            BufferPtr buffer = AlignedBuffer::allocate<Value>(numValues, pool);
            auto data = buffer->asMutable<Value>();
            memcpy(data, &values[0], buffer->size());
            return buffer;
        }
        return returnsNullptr ? nullptr : AlignedBuffer::allocate<Value>(0, pool);
    }
} // namespace kumo::pollux
